RHINOCEROS LEPTORHINUS. 375 



tubercle, m, is commonly, but not constantly present at 

 the entry of the valley, b. I have never seen it in an 

 upper molar of the tichorhine Rhinoceros. 



Professor Jager has figured an upper molar tooth from 

 the opposite side of the jaw to that in fig. 141, in the 

 Second Part of his ' Fossilen Sseuge-thiere Wurtembergs, 1 

 fol., 1839, tab. xvi., fig. 31. It was discovered in a sand- 

 pit (" sand-grube ") at Kirchberg, in Wirtemberg, and 

 exhibits about the same amount of attrition, the same 

 characteristic form of the principal valley, the anterior 

 basal ridge, the prominent longitudinal ridge (eT), and the 

 expanded convex bases of the inner lobes, separated by the 

 wide beginning, of the valley, as in the Clacton leptorhine 

 molar. Professor Jager notices the latter character,* and 

 the little tubercle (m) at the base of the valley, which 

 is likewise present in our Clacton leptorhine molars ;-f- but he 

 does not allude to the more important character, which his 

 figure represents, of the simple termination of the valley (J). 



The zealous investigator of the Wirtemberg Fossils 

 appears not to have perceived the specific resemblance 

 between the molars from Kirchberg and that from Crozes 

 (Gard), figured by Cuvier, torn, cit., pi. xiii., fig. 4. And, 

 as Cuvier had not obtained evidence to connect these speci- 

 mens with his Rh. leptorhinus, nor, indeed, appears to have 

 appreciated their difference from the molars of the ticho- 

 rhine Rhinoceros, Professor Jager had no clue to the 



* Professor Jager, after noticing the general resemblance of the fossil tooth 

 with a corresponding one of the African two-horned Rhinoceros, observes, 

 "allein er unterscheidet sich von ihm ausser der Grb'sse durch die mehrere 

 Rundung und Trennung der innern Abtheilungen, wodurch er sich noch insbe- 

 sondere von demselben Zahne von Cannstadt, tab. xvi. fig. 10, unterscheidet, 

 so wie durch den kleinen ho'cker in der Mitte zwischen beiden. p. 180. 



"T This is more strongly developed in the molar teeth of the Rhinoceros incisivits 

 (Acerotherium, Kaup). The Constadt tooth above cited is a molar of the Rh. 

 tichorhinus, closely agreeing with that from Chartham, fig. 122. 



The molar tooth of the tichorhine Rhinoceros, figured in the ' Ossemens 



